Reaktion #1095901

Reaktionsgleichung

ammonium chloride

4,6-dichloro-5-fluoropyrimidine

sodium hydride

2-butyn-1-ol

→

4-(2-butynyloxy)-6-chloro-5-fluoropyrimidine

Ausbeute 86.2%

Lösungsmittel

tetrahydrofuran

tetrahydrofuran

tetrahydrofuran

Reaktionsbedingungen

Aufarbeitung

1. 1
   workup.STIRRINGstirred for 90 minutes at 0° C
2. 2
   Extraktionthe mixture was extracted with tert-butyl methyl ether three times
3. 3
   WaschenThe organic layers were washed with a saturated sodium chloride aqueous solution
4. 4
   Trocknendried over anhydrous magnesium sulfate
5. 5
   Einengenconcentrated

Vorschrift

0.61 g of sodium hydride (60% oil suspension) was suspended in 20 ml of tetrahydrofuran. 1 ml of tetrahydrofuran solution of 0.73 g of 2-butyn-1-ol was added dropwise at 0° C. therein, and the mixture was stirred for 10 minutes. Into the mixture was added dropwise 5 ml of tetrahydrofuran solution of 1.75 g of 4,6-dichloro-5-fluoropyrimidine, and stirred for 90 minutes at 0° C. The reaction mixture was poured into a saturated ammonium chloride aqueous solution, and the mixture was extracted with tert-butyl methyl ether three times. The organic layers were washed with a saturated sodium chloride aqueous solution, dried over anhydrous magnesium sulfate and concentrated. The residue was subjected to silica gel column chromatography to obtain 1.8 g of 4-(2-butynyloxy)-6-chloro-5-fluoropyrimidine.

Quelle